nucleation center

简明释义

成核中心

英英释义

例句

1.In metallurgy, a nucleation center can influence the size and distribution of grains in a metal alloy.

在冶金学中，成核中心可以影响金属合金中晶粒的大小和分布。

2.In the process of crystallization, impurities often serve as a nucleation center to initiate the growth of crystals.

在结晶过程中，杂质通常作为成核中心来启动晶体的生长。

3.The formation of ice crystals begins at a nucleation center, where water molecules arrange themselves in a specific pattern.

冰晶的形成始于一个成核中心，水分子在这里以特定的模式排列。

4.Researchers are studying how temperature affects the stability of a nucleation center during polymerization.

研究人员正在研究温度如何影响聚合过程中成核中心的稳定性。

5.The nucleation center plays a crucial role in the formation of clouds by providing a surface for water vapor to condense.

在云的形成中，成核中心通过提供水蒸气凝结的表面起着至关重要的作用。

作文

In the field of science, particularly in materials science and physical chemistry, the concept of a nucleation center plays a crucial role in understanding how new phases of matter form. A nucleation center is essentially a site where the initial formation of a new phase occurs, such as the crystallization of a solid from a liquid or the formation of bubbles in a boiling liquid. This process is vital in various applications, including the production of pharmaceuticals, the manufacture of metals, and even in natural phenomena like cloud formation.To grasp the significance of a nucleation center, it is important to first understand the broader context of nucleation itself. Nucleation can be classified into two main types: homogeneous and heterogeneous. Homogeneous nucleation occurs uniformly throughout the parent phase, while heterogeneous nucleation takes place at specific sites, which is where the nucleation center comes into play. These centers can be impurities, defects, or surfaces that provide a conducive environment for the new phase to begin forming.For instance, consider the process of ice formation in clouds. Water vapor condenses around tiny particles, such as dust or salt, which act as nucleation centers. Without these particles, the water vapor would remain in a gaseous state, and clouds would not form. This illustrates how nucleation centers are essential not only in controlled environments like laboratories but also in natural systems.The importance of nucleation centers extends beyond just the formation of solids or liquids. In the realm of biology, they can influence processes such as protein folding and the aggregation of biomolecules. Misfolding of proteins can lead to diseases, and understanding the role of nucleation centers in these processes can help researchers develop better therapeutic strategies.Moreover, in industrial applications, controlling the formation of nucleation centers can lead to improved product quality. For example, in the production of steel, the presence of certain nucleation centers can enhance the strength and durability of the final product. Manufacturers often manipulate conditions such as temperature and pressure to optimize the formation of these centers, ensuring that the desired properties of the material are achieved.In conclusion, the concept of a nucleation center is fundamental to various scientific disciplines and practical applications. By providing a localized site for the initial formation of new phases, these centers significantly influence the behavior of materials and biological processes. Understanding and harnessing the power of nucleation centers can lead to advancements in technology, medicine, and environmental science, highlighting their critical role in both nature and industry.

在科学领域，尤其是材料科学和物理化学中，成核中心的概念在理解新相态物质如何形成方面起着至关重要的作用。成核中心本质上是一个新相态初始形成的地点，例如固体从液体中结晶或液体沸腾时气泡的形成。这个过程在各种应用中至关重要，包括制药、金属制造，甚至在自然现象如云的形成中。要掌握成核中心的重要性，首先需要理解成核本身的更广泛背景。成核可以分为两种主要类型：均匀成核和非均匀成核。均匀成核在母相中均匀发生，而非均匀成核则发生在特定的地点，这就是成核中心发挥作用的地方。这些中心可以是杂质、缺陷或提供有利环境的表面，使新相态开始形成。例如，考虑云中冰的形成过程。水蒸气在微小颗粒（如尘埃或盐）周围凝结，这些颗粒充当成核中心。如果没有这些颗粒，水蒸气将保持在气态，云将不会形成。这说明了成核中心在实验室等受控环境和自然系统中的重要性。成核中心的重要性不仅限于固体或液体的形成。在生物学领域，它们可以影响蛋白质折叠和生物分子聚集等过程。蛋白质错误折叠可能导致疾病，理解成核中心在这些过程中的作用可以帮助研究人员开发更好的治疗策略。此外，在工业应用中，控制成核中心的形成可以提高产品质量。例如，在钢铁生产中，某些成核中心的存在可以增强最终产品的强度和耐用性。制造商通常操纵温度和压力等条件，以优化这些中心的形成，确保材料的所需性能得以实现。总之，成核中心的概念对各种科学学科和实际应用至关重要。通过为新相态的初始形成提供局部位点，这些中心显著影响材料和生物过程的行为。理解和利用成核中心的力量可以推动技术、医学和环境科学的发展，突显其在自然和工业中的关键作用。